2308723523861 has 2 divisors, whose sum is σ = 2308723523862. Its totient is φ = 2308723523860.

The previous prime is 2308723523857. The next prime is 2308723523867. The reversal of 2308723523861 is 1683253278032.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1764330414961 + 544393108900 = 1328281^2 + 737830^2 .

It is a cyclic number.

It is not a de Polignac number, because 2308723523861 - 2² = 2308723523857 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2308723523867) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1154361761930 + 1154361761931.

It is an arithmetic number, because the mean of its divisors is an integer number (1154361761931).

Almost surely, 2^{2308723523861} is an apocalyptic number.

It is an amenable number.

2308723523861 is a deficient number, since it is larger than the sum of its proper divisors (1).

2308723523861 is an equidigital number, since it uses as much as digits as its factorization.

2308723523861 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2903040, while the sum is 50.

The spelling of 2308723523861 in words is "two trillion, three hundred eight billion, seven hundred twenty-three million, five hundred twenty-three thousand, eight hundred sixty-one".